I would like to get some immediate strong visual feedback for the commands I enter in emacs. For example, I would be happy if any key sequence (beginning with a modifier key) that I type appeared in large red letters in the centre of the current frame. Is there any package that does this?
(Currently, the key sequences only appear in the minibuffer, and with some delay. My problem is that I sometimes involutarily insert random letters in my documents because I accidentally press just s instead C-s etc. I'm hoping that stronger visual feedback might make me aware of most instances of such mistakes. I know there are nameless other editors with safeguards against this kind of "typo", but that's a different question.)
Clarification:
By immediate, I mean that I would ideally like to see something as soon as I press a control/meta key. If "C-x" shows up once I've pressed down "C" and hit "x", that's maybe also ok. But I don't want to wait until I've type out "C-x s".
I only want a feedback signal for command sequences, not for every letter I type. Starting from Drew's answer below, I've now found a couple of packages for creating screen casts, e.g. keystroke or keypression. However, just as showkey, they show all keyboard strokes, including the trivial ones.
By "frame", I meant active "window"/subframe. I would like to see a visual signal in the currently active "window"/subframe.